"Allegedly it was signed on this past Friday and g

"Allegedly it was signed on this past Friday and goes into effect on March 19th."

That will go into effect March 19th, the 3rd Friday

"-Triple witching is the simultaneous expiration of stock options, stock index futures, and stock index option contracts all on the same day. It happens four times a year: on the third Friday of March, June, September, and December. Because three option classes expire all on the same day, it can cause increased trading volume and unusual price action in the underlying assets.

-Triple witching is the quarterly expiration of stock options, stock index futures, and stock index option contracts all on the same day.

-Triple witching happens four times a year: on the third Friday of March, June, September, and December.

-Triple witching days, particularly the final hour of trading preceding the closing bell—called the "triple witching hour"—can result in escalated trading activity and volatility as traders close, roll out, or offset their expiring positions.

-Triple witching days generate trading activity and volatility because contracts that are allowed to expire may necessitate the purchase or sale of the underlying security. While some derivative contracts are opened with the intention of buying or selling the underlying security, traders seeking derivative exposure only must close, roll out, or offset their open positions prior to the close of trading on triple witching days.
https://www.reddit.com/r/wallstreetbets/comme...arch_19th/